JP3859842B2 - Position control device for guide device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a position control device for a guide device for rolled material.
[0002]
[Prior art]
As a position control device of the rolling material guide device, for example, as disclosed in Japanese Patent Application Laid-Open No. 61-241563, etc., a moving body is provided in which a feed screw shaft is meshed with a female screw and a guide device is installed on the upper part, The feed screw shaft is rotated by driving the rotation driving means to move the moving body along the roll axis of the rolling roll, the position of the guide device is controlled through the moving body, and after positioning of the guide device, the moving body is clamped. Various types of fixing have been proposed.
[0003]
[Problems to be solved by the invention]
The problems of the conventional example are as follows.
The first problem is that the clamp is released during the position adjustment of the moving body, so that play occurs at the time of fixing after positioning, and the position accuracy is impaired.
The second problem is that the moving body is positioned only in the forward and backward directions of the rolled material (perpendicular to the roll axis) by using only the clamp. Therefore, the front and rear shift occurs at the time of clamping, and high-accuracy position control is sufficiently achieved. It wasn't something.
A third problem is that a backlash is generated between the male screw of the feed screw shaft and the female screw of the moving body, and it is difficult to obtain a fine positional accuracy.
An object of the present invention is to increase the control accuracy of the adjustment position of the guide device.
[0004]
[Means for Solving the Problems]
A first feature of the present invention is a screw shaft, drive means for applying a rotational force to the screw shaft, a moving body that can move in the axial direction of the screw shaft as the screw shaft rotates, A rest bar having a fixing portion to be fixed, and a positioning fixing member that is attached to the rest bar and that is long along the axial direction of the screw shaft. The movable body includes a shift base in which a guide device is installed at an upper portion, and a shift bracket in which a female screw meshing with the screw shaft is provided at a lower portion of the shift base, and a contact portion is provided on the shift base. A clamp is provided on the shift bracket, and an operating portion of the clamp can be moved up and down in the gap between the shift bracket and the shift base. The fixing portion of the rest bar can move in the axial direction of the screw shaft in a relative relationship with the moving body in the gap, and the operating portion of the clamp can contact the fixing portion. The positioning fixing member is fixed on the fixing portion, and is disposed so as to be able to be opposed to the operation portion of the clamp and the fixing portion, and can contact the contact portion of the shift base. .
The second feature of the present invention is that the positioning and fixing member has inclined surfaces in the length direction so as to form a mountain-shaped cross section, and both the inclined surfaces are opposed to each other in the direction perpendicular to the length direction to A contact surface that can contact the contact portion is configured to prevent back and forth play in the traveling direction of the rolled material when the moving body is fixed, and the frictional force is low and driving means such as a motor required for movement This is because it requires less torque.
According to a third feature of the present invention, first and second screw brackets having internal threads with which a screw shaft meshes with each other are arranged opposite to each other, and either one of the first and second screw brackets is provided. Is connected to the shift bracket, and a spring is provided between the first and second screw brackets so that a preload is applied to correct backlash of the screw so that backlash does not occur.
A fourth feature of the present invention is that the screw shaft is connected to a ball speed reducer with a reduction ratio of 1/100 at the end on the drive means side, and the screw shaft is connected via the ball speed reducer by driving the drive means. Thus, the screw shaft can be rotated with high accuracy without causing backlash, and at a low torque.
A fifth feature of the present invention is that it is constituted by a hydraulic clamp mechanism having a hydraulic cylinder portion as a clamp, and the piston rod of this cylinder portion can be brought into contact with the fixed portion, thereby facilitating the fixing operation of the moving body. It is in.
According to a sixth aspect of the present invention, there is provided a screw shaft, a hydraulic motor that applies a rotational force to the screw shaft, a moving body that can move in the axial direction of the screw shaft as the screw shaft rotates, There is a rest bar having a fixing portion to be fixed, and two positioning fixing members attached to the rest bar and extending along the axial direction of the screw shaft. The movable body includes a shift base in which a guide device is installed at an upper portion, and a shift bracket in which a female screw meshing with the screw shaft is provided at a lower portion of the shift base, and a contact portion is provided on the shift base. A hydraulic cylinder part for clamping is provided by sandwiching the screw shaft in the shift bracket, and the piston rod of each hydraulic cylinder part can be moved up and down in the gap between the shift bracket and the shift base. is there. The fixing part of the rest bar can move in the axial direction of the screw shaft in the relative relationship with the moving body in the gap, and the piston rod can contact the fixing part. Each positioning fixing member is fixed on the fixing portion, and is disposed so as to be opposed to the piston rod of each hydraulic cylinder portion and the fixing portion. The at least one positioning and fixing member has an inclined surface in the length direction so as to form a cross-sectional chevron, and both the inclined surfaces face each other in a direction orthogonal to the length direction and A contact surface that can contact the contact portion is formed. If a ball speed reducer is provided between the screw shaft and the hydraulic motor, and a ball speed reducer with a reduction ratio of 1/100 is used as the ball speed reducer, ultra fine adjustment is possible.
[0005]
[Action]
When adjusting the position of the guide device and moving the moving body at a high speed, the clamp is released and the screw shaft is rotated at a high speed to align the moving body with a predetermined position. The contact portion of the shift base moves while contacting the contact surface of the positioning fixing member at a low pressure (low pressure fixing), and then the clamp operating portion is fixed to the fixing portion when fixed after positioning. Contact and fix the moving body to the fixed part. Even if it is fixed from low pressure to high pressure, the load is always applied, so there is no play.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4, the position control device for a guide device according to the present invention includes a screw shaft 1, a driving means 3 for applying a rotational force to the screw shaft via a ball speed reducer 2, and rotation of the screw shaft. Accordingly, the movable body 4 is movable in the axial direction of the screw shaft, the rest bar 5 having a fixing portion 5a to which the movable body is fixed, and attached to the rest bar and long along the axial direction of the screw shaft. Positioning and fixing members 6A and 6B are provided.
[0007]
The screw shaft 1 is pivotally supported by one bearing 7 on one end side (left end side in FIG. 1) and on the other bearing 7 by a non-backlash ball speed reducer 2 on the other end side. This ball speed reducer is connected to a hydraulic motor 8 by a universal joint 9 in the illustrated example constituting the main part of the driving means. The power of the hydraulic motor 8 is transmitted to the ball reducer 2 via the universal joint 9, and the rotational force of the ball reducer reaches the screw shaft 1.
[0008]
The movable body 4 includes a shift base 10 and a shift bracket 11 as shown in FIGS. On the shift base 10, a guide device G for a rolled material such as bar steel is fixed so as to be removable. The shift base 10 has a shift bracket 11 fixed at its lower portion with bolts 12, and a gap 13 is formed between the shift bracket and the shift bracket on both sides in the direction of travel of the rolled material (left and right direction in FIG. 6). The shift base 10 is movable in the axial direction of the screw shaft (the left-right direction in FIGS. 1 and 5) as the screw shaft 1 passing through the shift bracket 11 rotates.
As for the shift bracket 11, the 1st screw bracket 14 and the 2nd screw bracket 15 are fitting in the axial center hole part. 3 and 5, the first screw bracket 14 is formed in a T-shaped cross section, and the second screw bracket 15 is formed in a ring shape, and is composed of, for example, a trapezoidal screw at the axial center portion of each screw bracket. The female thread is cut. These female screws are engaged with male screws formed of, for example, trapezoidal screws provided on the outer periphery of the screw shaft 1. For this reason, the shift bracket 11 can slide parallel to the roll axis of the rolling roll R (FIG. 4) by the rotation of the screw shaft 1 through the screw brackets 14 and 15.
In order to eliminate the backlash between the internal thread of the shift bracket 11 (first and second screw brackets 14 and 15) and the external thread of the screw shaft 1, the shift bracket has a non-backlash mechanism as shown in FIG.
That is, the non-backlash mechanism will be described. The first screw bracket 14 is fixed to the shift bracket 11 with the bolt 16. The bolt 16 uses a hexagon socket head bolt in FIG. 5, but is not limited to this type of bolt. Bolts 17 are provided adjacent to the bolts 16. In the example of FIG. 6, the bolts 16 and the bolts 17 are alternately arranged on the same circle around the screw shaft 1 at equal intervals. This bolt uses a hexagon socket head bolt in FIG. 5, but is not limited to this type of bolt. The bolt 17 is inserted into the first screw bracket 14 so as to be movable in the axial direction, and the bolt tip is screwed into the second screw bracket 15 through the shift bracket 11. A compression spring 18 is wound around the outer periphery of the bolt 17 between the head of the bolt 17 and the shift bracket 11. Since the bolt 17 penetrates the shift bracket 11 from the first screw bracket 14 and compresses the compression spring 18 and is screwed into the second screw bracket 15, the bolt 17 is inserted into the shift bracket 11 and the shift bracket. The fixed first screw bracket 14 is always pressed in the right direction in FIG. 5, and the second screw bracket 15 is pressed in the left direction in the figure by the reaction force. The compression spring 18 applies preload to the male screw on the outer periphery of the screw shaft 1 and the female screws on the inner periphery of the first and second screw brackets 14 and 15 to correct backlash. The pressing force by the compression spring 18 can be arbitrarily adjusted by the strength of the compression spring and the screwing amount of the bolt 17. Thereby, the backlash at the screw of the screw shaft 1, the first screw bracket 14, and the second screw bracket 15 is eliminated (can be corrected).
[0009]
The shift bracket 11 is fixed to the fixing portion 5a of the rest bar 5 by a clamp mechanism. As the clamping mechanism, this apparatus includes a hydraulic clamping mechanism as shown in FIG.
Here, this hydraulic clamping mechanism will be described mainly with reference to FIG.
In the shift bracket 11, cylinder parts 19 serving as clamps are provided on both front and rear (left and right) sides in the traveling direction (left and right direction in the figure) of the rolled material, and each cylinder part is a single acting piston rod serving as an operating part. 20 is provided. The hydraulic oil sent from the hydraulic hose 21 is sent to one end (the lower end in the figure) of each cylinder portion 19 through the branch path 22, and the piston rod 20 moves forward by raising the oil pressure, and the rod upper portion 20 a is in the gap 13. It can contact | abut to the lower surface of the fixing | fixed part 5a of the rest bar 5 located in this. As the shift bracket 11 moves, the fixed portion 5a can move in the gap 13 in the axial direction of the screw shaft 1 (perpendicular to the drawing surface) relative to the shift bracket. The piston rod 20 has a bolt housing hole 20b in its axial center, and a bolt (hexagon socket head bolt in the figure) 22 whose tip is screwed into the shift bracket 11 is disposed in each bolt housing hole. ing. A compression spring 23 is wound around the outer periphery of the bolt 22 between the bolt head and the inner bottom portion of the bolt housing hole 20b. This compression spring always urges the spring force in the direction of pushing down the piston rod 20 (downward in the figure).
Positioning and fixing members 6A and 6B are opposed to each other on the front end side of each piston rod 20 with the fixing portion 5a of the rest bar 5 interposed therebetween, and each positioning fixing member is attached to the fixing portion with a bolt 24. . Each positioning fixing member 6A, 6B consists of a long member formed long along the screw shaft 1 as shown in FIGS. One positioning and fixing member 6A is formed in a mountain shape, and an upper surface of the positioning fixing member 6A intersects with an inclined contact surface A1, and these contact surfaces have an angle of approximately 45 ° with respect to the horizontal. The contact surface 6A1 of the positioning and fixing member 6A can contact a contact portion of the shift base 10, that is, a contact portion 25 formed of a contact member fixed with a bolt in the illustrated example. The other positioning and fixing member 6B can contact the contact surface 6B1 of the flat surface on the upper surface thereof with the contact portion of the shift base 10, in the illustrated example, the contact portion 26 formed of a contact member fixed with a bolt. It is.
[0010]
Here, a method of fixing and releasing the moving body 4 by the hydraulic clamp mechanism will be described. Note that the position adjustment of the guide device G is controlled through the fixing and opening operations of the moving body 4.
The fixing method at the time of high pressure fixing (hydraulic pressure high pressure: position fixing) is as follows.
The hydraulic oil is sent from the hydraulic hose 21 to the cylinder portion 19 to increase the hydraulic pressure, so that the piston rod 20 moves upward against the spring force of the compression spring 23 and comes into contact with the fixed portion 5a of the rest bar 5 Push. Since the shift bracket 11 is pressed downward by the reaction force of the pressing force, the contact portions 25 and 26 of the shift base 10 are pressed against the contact surfaces 6A1 and 6B1 of the positioning fixing members 6A and 6B. The positions of the shift base 10 and the shift bracket 11, that is, the moving body 4 are fixed. In particular, the positioning and fixing member 6A is formed in a mountain shape having a contact surface 6A1 made of an inclined surface, and the contact portion 25 of the shift base 10 is in contact with the contact surface 6A1, so that the movable body 4 shown in FIG. Right and left positioning is ensured.
The fixing method at the time of low pressure fixation (hydraulic pressure low pressure: at the time of fine position adjustment) is as follows.
At this time, by adjusting the oil pressure, the abutment portions 25 and 26 of the shift base 10 are set to be slidable on the abutment surfaces 6A1 and 6B1 of the positioning fixing members 6A and 6B. The position control is possible with high accuracy and no movement.
The release method when not fixed (hydraulic pressure 0: at the time of guide device position movement / maintenance) is as follows.
At this time, the piston rod 20 is pushed down by the force of the compression spring 23 pressed by the bolt 22 screwed into the shift bracket 11 by lowering the hydraulic pressure. As a result, the shift base 10 can move on the positioning and fixing members 6A and 6B.
[0011]
The control method of the position adjustment of the guide device G will be described. First, after fixing the piston rod 20 is released, the screw shaft 1 is rotated at a high speed to bring the moving body 4 to a predetermined position. Moves while rotating the screw shaft at a low speed while adjusting the oil pressure so that the contact portions 25 and 26 of the shift base 10 are slidable on the contact surfaces 6A1 and 6B1 of the positioning and fixing members 6A and 6B. The body is moved at a slow speed to finely adjust the position of the guide device G. After positioning, the piston rod is brought into high-pressure contact with the fixing portion 5a of the rest bar 5 to fix the moving body.
As described above, when the position of the guide device G is adjusted, the movable body 4 can be opened when the moving body 4 is moved at a high speed, fixed at a low pressure when the moving body 4 is moved (at the time of position adjustment), and fixed at a high pressure after positioning. For this reason, since the load is always applied from the low pressure fixing to the high pressure fixing, there is no backlash.
[0012]
According to the example shown in the drawing, position adjustment work such as fixing release, position movement, position fine adjustment, and fixing can be quickly performed by one person by remote control quickly, and the position adjustment work can be greatly reduced.
Although the hydraulic motor 8 is used as the driving means shown in FIG. 1, the present invention is not limited to this example, and mechanical driving means or manual operation may be used.
In the example of FIG. 1, if a non-backlash ball reducer with a reduction ratio of 1/100 is used as the reducer 2, a fine adjustment to a minimum movement amount of 0.05 mm, that is, a highly accurate position of 0.05 mm Control becomes possible.
The positioning surface 6A1 of the one positioning fixing member 6A to the shift base 10 has an angle of approximately 45 ° (± 45 °) with respect to the horizontal so that the rolling material can be positioned in the forward and backward directions and the low pressure. Enables sliding with low friction force when fixed. The angle of the contact surface may be approximately 20 ° to 60 °. The other positioning and fixing member 6B may be configured in the same manner as the one positioning and fixing member 6A, and the positioning and fixing member 6A may be configured in a flat plate shape as in the positioning and fixing member 6B.
[0013]
【The invention's effect】
According to the present invention, when the position of the guide device is controlled, it is possible to perform a three-stage operation of releasing the fixed when the moving body is moving at high speed, fixing the low pressure when moving at a slow speed (position adjustment), and fixing the high pressure after positioning. By sliding the abutment part of the moving body on the positioning and fixing member while maintaining the fixed state, a load is always applied from low pressure fixing to high pressure fixing. It became possible to control the position with high accuracy and no product defects occurred.
In this invention, the contact surface with the shift base in the positioning fixing member fixed to the rest bar is inclined, so that the back and forth in the traveling direction of the rolled material does not occur at the time of fixing, and the front and back positioning is accurately performed. In addition, the frictional force is low, and the torque of the driving means necessary for movement can be reduced.
In the present invention, by applying a preload to the screw of the screw shaft and the screw bracket with a compression spring in order to correct the backlash, it is possible to prevent the occurrence of backlash and improve the accuracy of position adjustment.
In the present invention, a non-backlash 1/100 ball speed reducer is incorporated between the drive means and the screw shaft, so that backlash does not occur and the rotation of the screw shaft can be controlled with high accuracy and low torque. Can be rotated.
In the present invention, a hydraulic motor is used as the driving means, and a hydraulic clamp mechanism having a hydraulic cylinder part is used as a clamp, so that it is safe because it can be adjusted by remote control, and several tens of people have conventionally been used. The operations such as opening, position movement, position fine adjustment, and fixing, which have been performed over a long time, can be quickly remotely operated by one switch alone, and the position adjustment work can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of the present invention.
FIG. 2 is an enlarged plan view showing an embodiment of the present invention, in which a guide device and driving means are omitted.
FIG. 3 is an enlarged exploded view of a main part showing an embodiment of the present invention.
FIG. 4 is an enlarged side view showing an embodiment of the present invention.
FIG. 5 is a partially cutaway cross-sectional view taken along the line AA in FIG. 6;
FIG. 6 is a partially cutaway enlarged side view of the main part showing the embodiment of the present invention.
FIG. 7 is an enlarged plan view of one positioning fixing member.
FIG. 8 is an enlarged plan view of the other positioning fixing member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Screw shaft 2 Ball reducer 3 Drive means 4 Moving body 5 Rest bar 5a Fixing part 6A Positioning fixing member 6A1 Contact surface 6B Positioning fixing member 6B1 Contact surface 8 Hydraulic motor (drive means)
10 shift base 11 shifts the bracket 13 gap 14 first screw bracket 15 second screw bracket 16 bolts (first bolts)
17 bolts ( second bolt )
18 Compression spring 19 Cylinder (clamp)
20 Piston rod (actuating part)
22 Hydraulic hose 25 Contact part 26 Contact part G Guide device R Rolling roll

Claims (4)

Screw shaft, drive means for applying a rotational force to the screw shaft, a moving body that can move in the axial direction of the screw shaft as the screw shaft rotates, a rest bar having a fixed portion to which the moving body is fixed, and and comprises a long two positioning and fixing member of the mounted and along the axial direction of the screw shaft in this rest bar,
The moving body, and shift base installing the guide device at the top, and a cie shift bracket in mesh with each other and fixed to the lower portion of the shift base and with the screw shaft, the shift base of the lower Yes and the contact portion provided on both sides, in the shift bracket is provided with a first and a second screw bracket, backlash mechanism and clamp,
The first and second screw brackets are fitted into the shaft hole of the shift bracket, both have a female screw that meshes with the screw shaft, and one of the first screw brackets has a T-shaped cross section. The other second screw bracket is formed in a ring shape, and the end surface of the first screw bracket opposite to the flange side and the end surface of the second screw bracket are arranged to face each other. And
The non-backlash mechanism includes: a first bolt that couples the shift bracket and the first screw bracket via a flange; a second bolt that couples the shift bracket and the second screw bracket; A compression spring for applying a preload to correct backlash to the male screw on the outer periphery of the screw shaft and the female screw on the inner periphery of the first and second screw brackets,
The first and second bolts are arranged around the screw shaft so as to surround the screw shaft, and are spaced apart from each other, and the second bolt moves in the axial direction in the first screw bracket. And is inserted through the shift bracket, the bolt tip is screwed into the second screw bracket,
The compression spring is wound around an outer peripheral portion of the second bolt between the head of the second bolt and the shift bracket, and the first spring is connected to the first screw bracket via the shift bracket. The spring force is urged toward the screw bracket 2
Each of the clamps is disposed with the screw shaft interposed therebetween, and includes an operating portion that can move up and down in a gap formed between the shift bracket and the shift base.
The fixing portion of the rest bar is disposed in the gap, and the operation portion of the clamp can contact the lower surface ,
Each positioning and fixing members are respectively fixed on the said fixed part, are arranged on opposite sides of the actuating portion and the fixed portion of the clamp, you can contact the contact portion of the shift base A position control device for a guide device. Positioning and fixing members are sectional mountain shape are formed on the inclined abutment surface position control device of the guide apparatus according to claim 1, wherein the contactable der Turkey the contact portion of the shift base . The screw shaft is connected to a ball speed reducer with a reduction ratio of 1/100 at the end on the drive means side, and the screw shaft is rotated via the ball speed reducer by driving the drive means. The position control device of the guide device according to claim 1 or 2.   4. The guide device according to claim 1, wherein the clamp is constituted by a hydraulic cylinder portion, and a piston rod which is an operation portion of the cylinder portion can be brought into contact with the fixed portion. Position control device.

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